8105000221 has 8 divisors (see below), whose sum is σ = 8532986400. Its totient is φ = 7677154800.

The previous prime is 8105000203. The next prime is 8105000279. The reversal of 8105000221 is 1220005018.

8105000221 is a nontrivial binomial coefficient, being equal to C(127319, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8105000221 - 2⁷ = 8105000093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8105007221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95490 + ... + 159148.

It is an arithmetic number, because the mean of its divisors is an integer number (1066623300).

Almost surely, 2^8105000221 is an apocalyptic number.

8105000221 is the 127318-th triangular number.

8105000221 is the 42440-th centered nonagonal number.

It is an amenable number.

8105000221 is a deficient number, since it is larger than the sum of its proper divisors (427986179).

8105000221 is a wasteful number, since it uses less digits than its factorization.

8105000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70379.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 8105000221 is about 90027.7747198052. The cubic root of 8105000221 is about 2008.7120137222.

Adding to 8105000221 its reverse (1220005018), we get a palindrome (9325005239).

The spelling of 8105000221 in words is "eight billion, one hundred five million, two hundred twenty-one", and thus it is an aban number.